Turner Designs TD-700, Руководство по эксплуатации

Страница: 39 / 55

TD-700 Laboratory Fluorometer Operating Manual
Page 38
APPENDIX 4
Troubleshooting
Symptom Solution Section To See
Power ON but Check the lamp; change if necessary. Section IV
readings stay Make sure the sample lid is closed
at zero tightly.
Power switch Make sure unit is plugged in securely;
ON, but no check power from the wall socket; Make
power sure power supply is functioning.
Display reads Sample reading is too high for the Appendix 8, H.
OVER instrument to read at the current
sensitivity level. Dilute samples to get
an on-scale reading. Or recalibrate and
reduce sensitivity.
Display reads Reading for Blank is less than zero Appendix 8, H.
negative (-) due to drift; reading for samples are
less than Blank. Reset Blank to Zero
or recalibrate.
Drifting The instrument is open loop and Section VII
readings readings will drift over a period of time; Section VIII
recalibrate to cure. Section IX
Erratic readings Instrument readings will fluctuate Section III
somewhat due to instrument noise, Section IV
especially at high sensitivity and when
reading low concentrations. If readings
are very erratic, check the lamp and
optical filters for damage/freckling.
Low readings; Sensitivity was not adjusted adequately Section VII
not enough during calibration; recalibrate. Or, make Section VIII
resolution sure the proper lamp and filters are Section IX
being used. Section III
Section IV